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Multiple access method of air vehicle cooperative information network

An information network and access method technology, applied in the field of wireless self-organizing network, can solve the problems of increased signal transmission collision probability, user access process is not clear, not proposed, etc., to improve the ability of signal directional transmission, low delay Information transmission capability, possible effect of reducing signal collision

Active Publication Date: 2019-03-29
CHINA ACAD OF LAUNCH VEHICLE TECH
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AI Technical Summary

Problems solved by technology

[0005] (1) This access method does not propose an antenna-related airspace resource usage plan, but is only a multi-user access method combining time domain and frequency domain. Resource allocation leads to the need for sequential transmission or broadcast transmission in different antennas when transmitting information, which wastes information transmission resources and prolongs the delay of specific information transmission
[0006] (2) This method does not involve the airspace prediction function of the transmission target. When different antennas of multiple platforms work at the same time, the probability of signal transmission collision increases, which limits the system capacity
[0007] (3) The access process of different users through time-frequency domain composite patterns is not yet clear, and the information processing method during information transmission is not mentioned

Method used

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  • Multiple access method of air vehicle cooperative information network
  • Multiple access method of air vehicle cooperative information network
  • Multiple access method of air vehicle cooperative information network

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Embodiment Construction

[0053] Aiming at the deficiencies of the prior art, the invention proposes a multi-access access method for aircraft cooperative information network. This access method discretizes the traditional information transmission frame, realizes the cooperative work of each node in the aircraft cooperative information network through the directional transmission at different frequency points and at different times, and realizes efficient, reliable, Covert access.

[0054] Such as figure 1 As shown, the processing flow of a multi-access method for aircraft cooperative information network proposed by the present invention, the specific processing steps are as follows:

[0055]1) The system transmission frame structure is as follows figure 1 As shown in , the transmission frame length must meet the following conditions:

[0056]

[0057] Among them, λ is the framing efficiency λ=S / L, S is the required transmission information length, L is the frame length after framing, ω is the ro...

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Abstract

The invention provides a multiple access method of an air vehicle cooperative information network, comprising a time-frequency space domain joint signal transmission system, a transmission target space domain determining method and a specific access procedure, wherein the time-frequency space domain joint signal transmission system determines a transmission frame structure applicable to a high-dynamic environment between nodes, and achieves the time-frequency space domain joint transmission of a transmission frame by means of discrete pulses. According to the transmission target space domain determining method, in a specific transmission process, a sending node is used for determining an antenna coverage area where a receiving node is located, thereby supporting the sending node to determine an antenna usage scheme when transmitting the specific information. The node access procedure is used for determining access procedures in specific node information transmission, network maintenance and other processes in the establishment and operation processes of the cooperative information network. By adoption of the multiple access method, the requirement of establishing the cooperative information network with an increasing number of inter-platform cooperative working nodes and increasingly complex task modes in the air / space high-speed motion can be met, and the simultaneous access delay of multiple nodes can be effectively shortened.

Description

technical field [0001] The invention relates to a multi-access method for an aircraft cooperative information network, which belongs to the technical field of wireless ad hoc networks, in particular to a multi-access method for a wireless ad-hoc network between outer space and high-speed moving objects in the air. Background technique [0002] Multiple access technology is a key technology for building wireless ad hoc networks, and it is used to solve the problem of efficient and coordinated use of transmission resources by each node in the wireless ad hoc network. Realize the functions of marking the source of transmission information and avoiding transmission resource conflicts. [0003] Traditional access methods can be roughly divided into access methods such as frequency division, time division, and code division. There are problems such as fixed delay and difficult time synchronization; the code division multiple access method has problems such as the near-far effect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/40H04W28/02H04W28/06H04W84/18H04B1/713H04B1/7176H04B7/185
CPCH04B1/713H04B1/7176H04B7/18506H04W28/0205H04W28/0231H04W28/065H04W84/18H04W4/40
Inventor 夏耘李喆王倩邓志均岑小锋姚国伟张凤王华常诚仇公望石铄
Owner CHINA ACAD OF LAUNCH VEHICLE TECH
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